1 files changed, 288 insertions, 0 deletions
diff --git a/drivers/misc/mei/debugfs.c b/drivers/misc/mei/debugfs.c
new file mode 100644
index 000000000..7b5df8fd6
--- /dev/null
+++ b/drivers/misc/mei/debugfs.c
@@ -0,0 +1,288 @@
+/*
+ *
+ * Intel Management Engine Interface (Intel MEI) Linux driver
+ * Copyright (c) 2012-2013, Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ */
+#include <linux/slab.h>
+#include <linux/kernel.h>
+#include <linux/device.h>
+#include <linux/debugfs.h>
+
+#include <linux/mei.h>
+
+#include "mei_dev.h"
+#include "client.h"
+#include "hw.h"
+
+static ssize_t mei_dbgfs_read_meclients(struct file *fp, char __user *ubuf,
+					size_t cnt, loff_t *ppos)
+{
+	struct mei_device *dev = fp->private_data;
+	struct mei_me_client *me_cl;
+	size_t bufsz = 1;
+	char *buf;
+	int i = 0;
+	int pos = 0;
+	int ret;
+
+#define HDR \
+"  |id|fix|         UUID                       |con|msg len|sb|refc|\n"
+
+	down_read(&dev->me_clients_rwsem);
+	list_for_each_entry(me_cl, &dev->me_clients, list)
+		bufsz++;
+
+	bufsz *= sizeof(HDR) + 1;
+	buf = kzalloc(bufsz, GFP_KERNEL);
+	if (!buf) {
+		up_read(&dev->me_clients_rwsem);
+		return -ENOMEM;
+	}
+
+	pos += scnprintf(buf + pos, bufsz - pos, HDR);
+#undef HDR
+
+	/*  if the driver is not enabled the list won't be consistent */
+	if (dev->dev_state != MEI_DEV_ENABLED)
+		goto out;
+
+	list_for_each_entry(me_cl, &dev->me_clients, list) {
+
+		if (mei_me_cl_get(me_cl)) {
+			pos += scnprintf(buf + pos, bufsz - pos,
+				"%2d|%2d|%3d|%pUl|%3d|%7d|%2d|%4d|\n",
+				i++, me_cl->client_id,
+				me_cl->props.fixed_address,
+				&me_cl->props.protocol_name,
+				me_cl->props.max_number_of_connections,
+				me_cl->props.max_msg_length,
+				me_cl->props.single_recv_buf,
+				kref_read(&me_cl->refcnt));
+
+			mei_me_cl_put(me_cl);
+		}
+	}
+
+out:
+	up_read(&dev->me_clients_rwsem);
+	ret = simple_read_from_buffer(ubuf, cnt, ppos, buf, pos);
+	kfree(buf);
+	return ret;
+}
+
+static const struct file_operations mei_dbgfs_fops_meclients = {
+	.open = simple_open,
+	.read = mei_dbgfs_read_meclients,
+	.llseek = generic_file_llseek,
+};
+
+static ssize_t mei_dbgfs_read_active(struct file *fp, char __user *ubuf,
+					size_t cnt, loff_t *ppos)
+{
+	struct mei_device *dev = fp->private_data;
+	struct mei_cl *cl;
+	size_t bufsz = 1;
+	char *buf;
+	int i = 0;
+	int pos = 0;
+	int ret;
+
+#define HDR "   |me|host|state|rd|wr|wrq\n"
+
+	if (!dev)
+		return -ENODEV;
+
+	mutex_lock(&dev->device_lock);
+
+	/*
+	 * if the driver is not enabled the list won't be consistent,
+	 * we output empty table
+	 */
+	if (dev->dev_state == MEI_DEV_ENABLED)
+		list_for_each_entry(cl, &dev->file_list, link)
+			bufsz++;
+
+	bufsz *= sizeof(HDR) + 1;
+
+	buf = kzalloc(bufsz, GFP_KERNEL);
+	if  (!buf) {
+		mutex_unlock(&dev->device_lock);
+		return -ENOMEM;
+	}
+
+	pos += scnprintf(buf + pos, bufsz - pos, HDR);
+#undef HDR
+
+	/*  if the driver is not enabled the list won't be consistent */
+	if (dev->dev_state != MEI_DEV_ENABLED)
+		goto out;
+
+	list_for_each_entry(cl, &dev->file_list, link) {
+
+		pos += scnprintf(buf + pos, bufsz - pos,
+			"%3d|%2d|%4d|%5d|%2d|%2d|%3u\n",
+			i, mei_cl_me_id(cl), cl->host_client_id, cl->state,
+			!list_empty(&cl->rd_completed), cl->writing_state,
+			cl->tx_cb_queued);
+		i++;
+	}
+out:
+	mutex_unlock(&dev->device_lock);
+	ret = simple_read_from_buffer(ubuf, cnt, ppos, buf, pos);
+	kfree(buf);
+	return ret;
+}
+
+static const struct file_operations mei_dbgfs_fops_active = {
+	.open = simple_open,
+	.read = mei_dbgfs_read_active,
+	.llseek = generic_file_llseek,
+};
+
+static ssize_t mei_dbgfs_read_devstate(struct file *fp, char __user *ubuf,
+					size_t cnt, loff_t *ppos)
+{
+	struct mei_device *dev = fp->private_data;
+	const size_t bufsz = 1024;
+	char *buf = kzalloc(bufsz, GFP_KERNEL);
+	int pos = 0;
+	int ret;
+
+	if  (!buf)
+		return -ENOMEM;
+
+	pos += scnprintf(buf + pos, bufsz - pos, "dev: %s\n",
+			mei_dev_state_str(dev->dev_state));
+	pos += scnprintf(buf + pos, bufsz - pos, "hbm: %s\n",
+			mei_hbm_state_str(dev->hbm_state));
+
+	if (dev->hbm_state >= MEI_HBM_ENUM_CLIENTS &&
+	    dev->hbm_state <= MEI_HBM_STARTED) {
+		pos += scnprintf(buf + pos, bufsz - pos, "hbm features:\n");
+		pos += scnprintf(buf + pos, bufsz - pos, "\tPG: %01d\n",
+				 dev->hbm_f_pg_supported);
+		pos += scnprintf(buf + pos, bufsz - pos, "\tDC: %01d\n",
+				 dev->hbm_f_dc_supported);
+		pos += scnprintf(buf + pos, bufsz - pos, "\tIE: %01d\n",
+				 dev->hbm_f_ie_supported);
+		pos += scnprintf(buf + pos, bufsz - pos, "\tDOT: %01d\n",
+				 dev->hbm_f_dot_supported);
+		pos += scnprintf(buf + pos, bufsz - pos, "\tEV: %01d\n",
+				 dev->hbm_f_ev_supported);
+		pos += scnprintf(buf + pos, bufsz - pos, "\tFA: %01d\n",
+				 dev->hbm_f_fa_supported);
+		pos += scnprintf(buf + pos, bufsz - pos, "\tOS: %01d\n",
+				 dev->hbm_f_os_supported);
+		pos += scnprintf(buf + pos, bufsz - pos, "\tDR: %01d\n",
+				 dev->hbm_f_dr_supported);
+	}
+
+	pos += scnprintf(buf + pos, bufsz - pos, "pg:  %s, %s\n",
+			mei_pg_is_enabled(dev) ? "ENABLED" : "DISABLED",
+			mei_pg_state_str(mei_pg_state(dev)));
+	ret = simple_read_from_buffer(ubuf, cnt, ppos, buf, pos);
+	kfree(buf);
+	return ret;
+}
+static const struct file_operations mei_dbgfs_fops_devstate = {
+	.open = simple_open,
+	.read = mei_dbgfs_read_devstate,
+	.llseek = generic_file_llseek,
+};
+
+static ssize_t mei_dbgfs_write_allow_fa(struct file *file,
+					const char __user *user_buf,
+					size_t count, loff_t *ppos)
+{
+	struct mei_device *dev;
+	int ret;
+
+	dev = container_of(file->private_data,
+			   struct mei_device, allow_fixed_address);
+
+	ret = debugfs_write_file_bool(file, user_buf, count, ppos);
+	if (ret < 0)
+		return ret;
+	dev->override_fixed_address = true;
+	return ret;
+}
+
+static const struct file_operations mei_dbgfs_fops_allow_fa = {
+	.open = simple_open,
+	.read = debugfs_read_file_bool,
+	.write = mei_dbgfs_write_allow_fa,
+	.llseek = generic_file_llseek,
+};
+
+/**
+ * mei_dbgfs_deregister - Remove the debugfs files and directories
+ *
+ * @dev: the mei device structure
+ */
+void mei_dbgfs_deregister(struct mei_device *dev)
+{
+	if (!dev->dbgfs_dir)
+		return;
+	debugfs_remove_recursive(dev->dbgfs_dir);
+	dev->dbgfs_dir = NULL;
+}
+
+/**
+ * mei_dbgfs_register - Add the debugfs files
+ *
+ * @dev: the mei device structure
+ * @name: the mei device name
+ *
+ * Return: 0 on success, <0 on failure.
+ */
+int mei_dbgfs_register(struct mei_device *dev, const char *name)
+{
+	struct dentry *dir, *f;
+
+	dir = debugfs_create_dir(name, NULL);
+	if (!dir)
+		return -ENOMEM;
+
+	dev->dbgfs_dir = dir;
+
+	f = debugfs_create_file("meclients", S_IRUSR, dir,
+				dev, &mei_dbgfs_fops_meclients);
+	if (!f) {
+		dev_err(dev->dev, "meclients: registration failed\n");
+		goto err;
+	}
+	f = debugfs_create_file("active", S_IRUSR, dir,
+				dev, &mei_dbgfs_fops_active);
+	if (!f) {
+		dev_err(dev->dev, "active: registration failed\n");
+		goto err;
+	}
+	f = debugfs_create_file("devstate", S_IRUSR, dir,
+				dev, &mei_dbgfs_fops_devstate);
+	if (!f) {
+		dev_err(dev->dev, "devstate: registration failed\n");
+		goto err;
+	}
+	f = debugfs_create_file("allow_fixed_address", S_IRUSR | S_IWUSR, dir,
+				&dev->allow_fixed_address,
+				&mei_dbgfs_fops_allow_fa);
+	if (!f) {
+		dev_err(dev->dev, "allow_fixed_address: registration failed\n");
+		goto err;
+	}
+	return 0;
+err:
+	mei_dbgfs_deregister(dev);
+	return -ENODEV;
+}
+